Accommodate gelatin or glass filters to thickness of approx. 2mm. The AF-3 is used with 3-inch square gelatin filters and Nikkor lenses having an attachment size of 52/62/67/72/77mm. Nikon also offers dedicated hood options, the HN-36 for the AF-3. Several hoods of equal diameter can be stacked, depending on the focal length of the lens in use.